*** error 65: access violation at I:0x80 : no 'write' permission

 *** error 65: access violation at I:0x80 : no 'write' permission

hi i am sam and i m new user to keil using a eval version. currently i m getting error as follows
but after certain time and after some definte loop,
plz help me to solve this problem.

*** error 65: access violation at I:0x80 : no 'write' permission

 RE: *** error 65: access violation at I:0x80 : no 'write' permission

Please remember to select a Toolset (Product)!

"*** error 65: access violation at I:0x80 : no 'write' permission"

Does your target actually have any writable memory at I:0x80; ie, address 0x80 in IDATA space?

Remember: a true 8051 has only 128 bytes of internal RAM; the 8052 added the extra 128 bytes for IDATA addresses >0x7F

 RE: *** error 65: access violation at I:0x80 : no 'write' permission

i m working on the eval version 3,and prog. is in assembly lang. controller is 89c2051.in the prog there some fixed task which repeting again and again. the prog. work properly for some fix time but after that it jump's to any where in prog.

 There is no memory at I:0x80 - hencre no permission to write to it!

You didn't answer the question: Does your processor have any writable RAM at I:0x080?

In fact, does your processor have any memory at all at I:0x080??

I you don't already know, you can find the answer in the chip's Datasheet (and if you've been writing programs without knowing, it is not surprising that they misbehave!)

 RE: There is no memory at I:0x80 - hencre no permission to write to it!

thank's for the help and i find the soln my way now the code is working properly on h\w. And compliting its all task without any trouble

 RE: *** error 65: access violation at I:0x80 : no 'write' permission

controller is 89c2051.

In that case, have a look at the datasheet and check how much RAM the thing actually has.

http://www.keil.com/dd/chip/2984.htm

in the prog there some fixed task which repeting again and again. the prog. work properly for some fix time but after that it jump's to any where in prog.

As long as you're not willing to be more specific (code examples would be nice. if you do post code, please read the guidelines on posting formatted source code), the only thing that can be stated about your program is that it is buggy.

 RE: *** error 65: access violation at I:0x80 : no 'write' permission

http://www.keil.com/support/docs/814.htm

Jon

 Code runs in Simulator, but not real hardware

Yes, you can tell the Simulator to allow accesses to any addresses you like: http://www.keil.com/support/docs/814.htm
But if the memory doesn't physically exist, your code won't work when you try it on a real target!

This is a good illustration of one way to get code that won't work on real hardware, but will run in the simulator!